Essentially, all of them, but you will have to submit a ticket so they can convert the instructions for Echophp.
The script works on top of phpBB and doesn't alter it too much so all the mods work under the given circumstances.

That is a file ownership problem. I am not a member of Echophp's team but I can assist you if you provide me with your SSH details via private message. Sorry but I cannot provide you with step-by-step instructions how to fix your issue. Alternatively, you can submit a ticket to http://help.echophp.c...

My request comes in two parts.
1) Automatic forum pruning (self explainatory?)
2) An upgrade feature to make a forum undeletable. This would be useful if someone enables automatic pruning but the administrator desides to pay to use his otherwise inactive forum for informational purposes only.